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Spontaneous imbibition experiments for enhanced oil recovery with silica nanosols / M. I. Pryazhnikov, V. A. Zhigarev, A. V. Minakov, I. V. Nemtsev // Capillarity. - 2024. - Vol. 10, Is. 3. - P. 73-86, DOI 10.46690/capi.2024.03.02. - Cited References: 53. - This work is partially financed by Ministry of Science and Higher Education of the Russian Federation (No. FSRZ2020-0012) . - ISSN 2709-2119. - ISSN 2652-3310
Кл.слова (ненормированные):
Spontaneous imbibition -- enhanced oil recovery -- silica nanosols -- wettability -- interfacial tension
Аннотация: Experimental oil displacement as a result of spontaneous imbibition of silica nanosols has been carried out using two types of sandstone as the reservoir rock. The permeability of the cores ranged from 0.34 to 333 mD, while the porosity was 11% and 22%, respectively. During the research, the influence of the concentration and nanoparticle size, as well as the permeability of the rock, on the process of spontaneous imbibition, was studied. Silica nanosols were considered as an object of study. The nanoparticle size ranged from 10 to 35 nm. The mass concentration of nanoparticles varied from 0.01% to 0.25%. It was found that the use of silica nanosols significantly increases the rate of the spontaneous imbibition process. It was established that a silica nanosol with a nanoparticle size of 10 nm and a concentration of 0.25% allows to displace more than six times oil compared to the reservoir water model in the same time. As a result, it was shown that the oil displacement efficiency and the efficiency of spontaneous imbibition increase along with an increase in the nanoparticle concentration and a decrease in the nanoparticle size.

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Держатели документа:
Laboratory of Physical and Chemical Technologies for the Development of Hard-to-Recover Hydrocarbon Reserve, Siberian Federal University, Krasnoyarsk 660041, Russia
Laboratory of Heat Exchange Control in Phase and Chemical Transformations, Kutateladze Institute of Thermophysics, SB RAS, Novosibirsk 630090, Russia
Department of Molecular Electronics, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk 660036, Russia
Laboratory of molecular spectroscopy, L.V. Kirensky Institute of Physics, SB RAS, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Pryazhnikov, M. I.; Zhigarev, V. A.; Minakov, A. V.; Nemtsev, I. V.; Немцев, Иван Васильевич
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Manifestation of stoichiometry deviation in silica-coated magnetite nanoparticles / S. V. Stolyar, R. N. Yaroslavtsev, A. V. Tyumentseva [et al.] // J. Phys. Chem. C. - 2022. - Vol. 126, Is. 17. - P. 7510-7516, DOI 10.1021/acs.jpcc.2c00349. - Cited References: 30. - This work was supported by the Russian Science Foundation and the Krasnoyarsk Region Science and Technology Support Fund, grant No. 22-14-20020. We are grateful to the Center of collective use of FRC KSC SB RAS for the provided equipment . - ISSN 1932-7447
Кл.слова (ненормированные):
High resolution transmission electron microscopy -- Magnetite nanoparticles -- Magnetization -- Nanomagnetics -- Silica -- Silicates -- Stoichiometry -- Synthesis (chemical) -- Temperature distribution
Аннотация: Iron oxide nanoparticles were synthesized by the coprecipitation method. Two varying Fe3O4/tetraethoxysilane ratios were used for silanization: 1:1.3 and 1:4.5. The samples were investigated using transmission electron microscopy, ferromagnetic resonance, IR spectroscopy, and magnetometry. Magnetic measurements have shown that the magnetite core in nanoparticles has a higher magnetization than stoichiometric magnetite nanoparticles of the same size. The increased magnetization was caused by the deviation of the magnetite stoichiometry due to the interaction with the silicate coating. The blocking temperature distribution was determined from the temperature dependence of the coercive force and from the ZFC/FC dependencies. Nanoparticles with a thicker shell have shown greater efficiency in DNA isolation.

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Держатели документа:
Krasnoyarsk Scientific Center, Federal Research Center KSC SB RAS, Akademgorodok 50, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50, Bld. 38, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660049, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Yaroslavtsev, R. N.; Tyumentseva, A. V.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Tyutrina, E. S.; Saitova, A. T.; Gerasimova, Yu. V.; Герасимова, Юлия Валентиновна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Iskhakov, R. S.; Исхаков, Рауф Садыкович
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    The manifestation of stoichiometry deviation in silica-coated magnetite nanoparticles / S. V. Stolyar, D. A. Velikanov, A. V. Tyumentseva [et al.] // VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022) : Book of abstracts / program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 2, Sect. M : Magnetism in biology and medicine. - Ст. M.P15. - P. 451-453. - Cited References: 4. - The study was supported by the Russian Science Foundation and the Krasnoyarsk Region Science and Technology Support Fund., grant No. 22-14-20020 . - ISBN 978-5-94469-051-7
   Перевод заглавия: Проявление отклонения от стехиометрии в наночастицах магнетита, покрытых кремнезёмом

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Krasnoyarsk Scientific Center, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia

Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Tyumentseva, A. V.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Gerasimova, Yu. V.; Герасимова, Юлия Валентиновна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Российская академия наук; Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН; Казанский (Приволжский) федеральный университет; Euro-Asian Symposium "Trends in MAGnetism"(8 ; 2022 ; Aug. ; 22-26 ; Kazan); "Trends in MAGnetism", Euro-Asian Symposium(8 ; 2022 ; Aug. ; 22-26 ; Kazan)
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Silica-coated iron oxide nanoparticles for DNA isolation for molecular genetic studies in hematology / A. V. Tyumentseva, R. N. Yaroslavtsev, S. V. Stolyar [et al.] // Genet. Test. Mol. Biomark. - 2021. - Vol. 25, Is. 9. - P. 611-614, DOI 10.1089/gtmb.2021.0067. - Cited References: 16 . - ISSN 1945-0265. - ISSN 1945-0257

РУБ Biochemistry & Molecular Biology + Genetics & Heredity
Рубрики:
OXIDATIVE STRESS
MUTATION
DAMAGE
Кл.слова (ненормированные):
magnetic nanoparticles -- DNA isolation -- myeloproliferative neoplasms -- JAK2 V617F
Аннотация: Aim: To develop magnetic nanoparticles (MNPs) based on iron oxide for DNA isolation from blood cells for quantitative molecular genetic analyses of the V617F mutation in the Januskinase 2 (JAK2) gene. Materials and Methods: MNPs were synthesized by the coprecipitation method and coated with tetraethyl orthosilicate (TEOS). The size and shape of the complexes were estimated using transmission electron microscopy. Twenty blood samples from patients with myeloproliferative disorders were used for DNA isolation with the MNPs. DNA quality and compatibility for molecular genetic studies of the JAK2 V617F mutation were investigated by gel electrophoresis and real-time polymerase chain reaction (RT-PCR). Results: The average amount of DNA isolated from 150 μL of whole blood was 75.2 ng when MNPs were used and 72.5 ng when standard silica sorbent was used. There was no DNA damage observed after interaction with MNPs. RT-PCR demonstrated similar values for the JAK2 V617F mutant DNA ratios in the samples after DNA isolation with MNPs and by standard sorption on silica. Conclusions: MNPs with silicate capsules of sufficient thickness were obtained and the undesirable damaging effect of iron oxides on nucleic acids during isolation from cells were eliminated. Designed MNPs allow obtaining intact DNA for molecular genetic studies using the example of the JAK2 V617F for study.

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Держатели документа:
RAS, Krasnoyarsk Sci Ctr, Fed Res Ctr, Siberian Branch, Akademgorodok 50,Str 12-2, Krasnoyarsk 660036, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Fed Med Biol Agcy, Fed Siberian Res Clin Ctr, Fed State Financed Inst, Krasnoyarsk, Russia.
Natl Res Ctr Hematol, Dept Hlth, Krasnoyarsk Branch, Krasnoyarsk, Russia.

Доп.точки доступа:
Tyumentseva, Anna, V; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Stolyar, S. V.; Столяр, Сергей Викторович; Saitova, Alina T.; Саитова, Алина Тимуровна; Tyutrina, Ekaterina S.; Gorbenko, Alexey S.; Stolyar, Marina A.; Olkhovskiy, Igor A.
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Effects of modified magnetite nanoparticles on bacterial cells and enzyme reactions / L. S. Bondarenko, E. S. Kovel, K. A. Kydralieva [et al.] // Nanomaterials. - 2020. - Vol. 10, Is. 8. - Ст. 1499. - P. 1-20, DOI 10.3390/nano10081499. - Cited References: 83. - This research was funded by the Russian Foundation for Basic Research (#19-315-50048, #19-33-90149, and #18-29-19003) . - ISSN 2079-4991
Кл.слова (ненормированные):
Magnetite nanoparticles -- Humic acids-coated magnetite nanoparticles -- Silica-coated magnetite nanoparticles -- Zeta potential -- Hydrodynamic diameter -- Toxicity -- Bioluminescence -- Bacterial assay -- Enzymatic assay -- Oxidative stress -- Photobacterium phosphoreum -- NADH:FMN-oxidoreductase -- Luciferase
Аннотация: Current paper presents biological effects of magnetite nanoparticles (MNPs). Analyzing effects of MNP’ characteristics (zeta-potential and hydrodynamic diameters) on bacteria and their enzyme reactions was the main focus. Photobacterium phosphoreum and bacterial enzymatic reactions were chosen as bioassays. Three types of MNPs were under study: bare Fe3O4, Fe3O4 modified with 3-aminopropyltriethoxysilane (Fe3O4/APTES), and humic acids (Fe3O4/HA). Effects of the MNPs were studied at a low concentration range (< 2 mg/L) and attributed to availability and oxidative activity of Fe3+, high negative surface charge, and low hydrodynamic diameter of Fe3O4/HA, as well as higher Fe3+ content in suspensions of Fe3O4/HA. Low-concentration suspensions of bare Fe3O4 provided inhibitory effects in both bacterial and enzymatic bioassays, whereas the MNPs with modified surface (Fe3O4/APTES and Fe3O4/HA) did not affect the enzymatic activity. Under oxidative stress (i.e., in the solutions of model oxidizer, 1,4-benzoquinone), MNPs did not reveal antioxidant activity, moreover, Fe3O4/HA demonstrated additional inhibitory activity. The study contributes to the deeper understanding of a role of humic substances and silica in biogeochemical cycling of iron. Bioluminescence assays, cellular and enzymatic, can serve as convenient tools to evaluate bioavailability of Fe3+ in natural dispersions of iron-containing nanoparticles, e.g., magnetite, ferrihydrite, etc.

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Держатели документа:
Moscow Aviation Institute (National Research University), Moscow, 125993, Russian Federation
Institute of Physics SB RAS, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Biophysics SB RAS, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Problems of Chemical Physics RAS, Moscow Region, Chernogolovka, 142432, Russian Federation
University of Szeged, Szeged, H-6720, Hungary
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Bondarenko, L. S.; Kovel, E. S.; Ковель, Екатерина Сергеевна; Kydralieva, K. A.; Dzhardimalieva, G. I.; Illes, E.; Tombacz, E.; Kicheeva, A. G.; Kudryasheva, N. S.
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Effect of Heat Treatment on the Stability of Nanosized (Co40Fe40B20)34(SiO2)66/ZnO/In2O3 Multilayers / I. V. Babkina, M. N. Volochaev, O. V. Zhilova [et al.] // Bull. Russ. Acad. Sci. Phys. - 2020. - Vol. 84, Is. 9. - P. 1100-1103, DOI 10.3103/S1062873820090051. - Cited References: 11. - This work was supported by the RF Ministry of Science and Higher Education as part of State Task no. FZGM-2020-0007 . - ISSN 1062-8738
Кл.слова (ненормированные):
After-heat treatment -- Binary alloys -- Film preparation -- II-VI semiconductors -- Ion beams -- Magnetic semiconductors -- Multilayers -- Oxide minerals -- Semiconducting indium compounds -- Semiconducting silicon compounds -- Semiconducting zinc compounds -- Silica -- Silicon -- Sputtering -- Wide band gap semiconductors -- Zinc oxide
Аннотация: An investigation is performed of the thermal stability and phase transformations of thin-film heterogeneous [(Co40Fe40B20)34(SiO2)66/ZnO/In2O3]85 multilayers obtained via ion beam sputtering. The system contains 85 layers, each consisting of a (Co40Fe40B20)34(SiO2)66 composite layer and ZnO and In2O3 semiconductor spacers. The sample structure in the initial state and after heat treatment is studied by means of X-ray diffraction. It is shown that the samples are stable at temperatures of up to 500°С. Zn2SiO4, InBO3, CoFe, and In2O3 phases form during annealing.

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Публикация на русском языке Влияние термообработки на стабильность наноразмерных многослойных структур (Co40Fe40B20)34(SiO2)66/ZnO/In2O3 [Текст] / И. В. Бабкина, М. Н. Волочаев, О. В. Жилова [и др.] // Изв. РАН. Сер. физич. - 2020. - Т. 84 № 9. - С. 1293-1296

Держатели документа:
Voronezh State Technical University, Voronezh, 394026, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Babkina, I. V.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Zhilova, O. V.; Kalinin, Y. E.; Kashirin, M. A.; Sitnikov, A. V.; Chehonadskih, M. V.; Yanchenko, L. I.
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    Microstrip resonator for nonlinearity investigation of thin magnetic films and magnetic frequency doubler / B. A. Belyaev, A. O. Afonin, A. V. Ugrymov [et al.] // Rev. Sci. Instrum. - 2020. - Vol. 91, Is. 11. - Ст. 114705, DOI 10.1063/5.0009045. - Cited References: 40. - This work was supported by the Russian Science Foundation under Grant No. 19-72-10047 . - ISSN 0034-6748
   Перевод заглавия: Микрополосковый резонатор для исследования нелинейностей в тонких магнитных пленках и магнитного умножителя частоты на два
Кл.слова (ненормированные):
Binary alloys -- Conversion efficiency -- Efficiency -- Frequency doublers -- Iron alloys -- Magnetic devices -- Magnetic films -- Microwave resonators -- Silica -- Thin films
Аннотация: A structure that consists of a λ/4 stepped-impedance microstrip resonator is proposed as an instrument for the investigation of nonlinear effects in thin magnetic films and also can be used as a microwave frequency doubler. A conversion efficiency of 0.65% is observed at a one-layer 100 nm Ni80Fe20 thin film at an input signal level of 4.6 W for a 1 GHz probe signal. The maximum measured conversion efficiency (1% at 1 GHz) was achieved for the 9-layer Ni80Fe20 film where 150 nm magnetic layers were separated by SiO2 layers.

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Держатели документа:
Kirensky Institute of Physics SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Afonin, A. O.; Афонин, Алексей Олегович; Ugryumov, A. V.; Угрюмов, Андрей Витальевич; Govorun, I. V.; Говорун, Илья Валерьевич; Solovev, P. N.; Соловьев, Платон Николаевич; Leksikov, An. A.; Лексиков, Андрей Александрович
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Magnetic Properties of Ultrafine ε-Fe2O3 Nanoparticles in a Silicon Xerogel Matrix / Y. V. Knyazev [et al.] // Bull. Russ. Acad. Sci. Phys. - 2019. - Vol. 83, Is. 7. - P. 875-877, DOI 10.3103/S1062873819070219. - Cited References: 11 . - ISSN 1062-8738
Кл.слова (ненормированные):
Hematite -- High resolution transmission electron microscopy -- Magnetic properties -- Nanoparticles -- Silica -- Silicon -- Silicon oxides -- Xerogels
Аннотация: A new metamaterial is obtained on the basis of ε-Fe2O3 nanoparticles immobilized in a xerogel matrix. Samples are synthesized by impregnating SiO2 hydrogel with iron (II) salts with subsequent drying and calcination. The structure and magnetic properties of the composites are probed using transmission electron microscopy, X-ray diffraction, Mössbauer spectroscopy, and static magnetic measurements. © 2019, Allerton Press, Inc.

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Публикация на русском языке

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Yakushkin, S. S.; Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Semenov, S. V.; Семёнов, Сергей Васильевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Kirillov, V. L.; Martyanov, O. N.
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ε-Fe2O3 nanoparticles embedded in silica xerogel – Magnetic metamaterial / S. S. Yakushkin [et al.] // Ceram. Int. - 2018. - Vol. 44, Is. 15. - P. 17852-17857, DOI 10.1016/j.ceramint.2018.06.254. - Cited References: 31. - This work was supported by the Russian Science Foundation, project no. 17-12-01111. . - ISSN 0272-8842
Кл.слова (ненормированные):
ε-Fe2O3 iron oxide nanoparticles -- Metamaterial -- Mossbauer spectroscopy -- Magnetic properties -- Magnetic circular dichroism
Аннотация: A novel method for synthesizing a new metamaterial based on ε-Fe2O3 nanoparticles immobilized in the xerogel matrix was proposed. Samples with different contents of ε-Fe2O3 nanoparticles dispersed in silica xerogel were synthesized by impregnation of as prepared hydrogel with iron (II) salts with the subsequent calcination. The structure and magnetic properties of the prepared composites were studied by transmission electron microscopy, X-ray diffraction, Mössbauer spectroscopy, and static magnetic measurements. The absence of other iron oxide polymorphs, controllable particle size distribution, and high ε-Fe2O3 nanoparticle concentration in combination with the weak interparticle magnetic interactions ensured the preservation of the unique magnetic properties of individual ε-Fe2O3 nanoparticles and allowed us to obtain a novel metamaterial. The high optical transparency and homogeneity of the prepared composites made it possible to detect the magnetic circular dichroism (MCD) of the magnetic silica xerogel, which is typical of the ε-Fe2O3-based systems.

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Держатели документа:
Boreskov Institute of Catalysis, Russian Academy of Sciences, Siberian Branch, Novosibirsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Yakushkin, S. S.; Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Semenov, S. V.; Семёнов, Сергей Васильевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Bayukov, O. A.; Баюков, Олег Артемьевич; Kirillov, V. L.; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Edelman, I. S.; Эдельман, Ирина Самсоновна; Martyanov, O. N.
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10.

ε-Fe2O3 nanoparticles in silica matrix. system with unique magnetic properties for catalysis / S. S. Yakushkin [и др.] // Moscow Int. Symp. on Magnet. (MISM-2017) : 1-7 July 2017 : book of abstracts. - 2017. - Ст. 3OR-C-6. - P. 425. - Cited References: 6. - Support by Russian Science Foundation (Grant No. 17-12-01111)

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Доп.точки доступа:
Yakushkin, S. S.; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Bukhtiyarova, G. A.; Martyanov, O. N.; Moscow International Symposium on Magnetism(7 ; 2017 ; Jul. ; Moscow); Московский государственный университет им. М.В. Ломоносова; Российский фонд фундаментальных исследований
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